Pliosaur Posted October 28, 2022 Share Posted October 28, 2022 Hello everyone! would like some help with identification on this theropod dinosaur tooth! Information as follows: morrison formation skull creek quarries moffat Co, Colorado measures 1.71 diagonal pictures attached Link to comment Share on other sites More sharing options...
Pliosaur Posted October 28, 2022 Author Share Posted October 28, 2022 @Troodon Link to comment Share on other sites More sharing options...
Troodon Posted October 28, 2022 Share Posted October 28, 2022 Isolated Morrison teeth are difficult but will give it a shot. Unfortunately photos alone are not adequate to ID. 1) Please provide all the following information: CH, CBL, CBW and serration density both carinae. 2)Please verify that the mesial carina extends to base. Link to comment Share on other sites More sharing options...
Pliosaur Posted October 28, 2022 Author Share Posted October 28, 2022 Hello @Troodon thanks for the input, it was sold as a Allosaurus Fragilis tooth below I’ve attached some of the measurements CH: 36mm CBL:23mm CBW:10 mm The mesial carina does extend to the base of the tooth on the CH but does not seem to extend to base on other side, maybe worn although not sure Link to comment Share on other sites More sharing options...
Troodon Posted October 28, 2022 Share Posted October 28, 2022 Very nice tooth but there are a number of Allosaurids not sure how seller knew it was from that Taxon. The mesial edge is the outer edge, part of the distal is missing by the base, see illustration CHR 1.56 CBR .43 Better lit photo to see carina Link to comment Share on other sites More sharing options...
Pliosaur Posted October 28, 2022 Author Share Posted October 28, 2022 @Troodon thanks for the clarification! as that is the case, since the distal is missing would the identification of this tooth be simply limited to “allosaurid”? or would other measurements be needed to fully identify this theropod tooth Link to comment Share on other sites More sharing options...
Troodon Posted October 28, 2022 Share Posted October 28, 2022 Yes why I asked Link to comment Share on other sites More sharing options...
Pliosaur Posted October 28, 2022 Author Share Posted October 28, 2022 @Troodon Mesial carina does not extend to base distal serration density 13 denticles per 5mm (CH) mesial serration density approximately 12 denticles per 5mm Link to comment Share on other sites More sharing options...
Troodon Posted October 28, 2022 Share Posted October 28, 2022 3 minutes ago, dinosaur12lee said: Mesial carina does not extend to base Thanks for density Can you take a better photo I see that carina extending pretty far Link to comment Share on other sites More sharing options...
Pliosaur Posted October 28, 2022 Author Share Posted October 28, 2022 (edited) Additional pics @Troodon Edited October 28, 2022 by dinosaur12lee Link to comment Share on other sites More sharing options...
Troodon Posted October 28, 2022 Share Posted October 28, 2022 The morphology space occupied with Allosaurus teeth is also seen by Ceratosaurus so it's a difficult call. After looking at all the characteristics, many of which would fall with either one, I would lean towards an Allosaurus sp.. Very nice tooth. Link to comment Share on other sites More sharing options...
Pliosaur Posted October 29, 2022 Author Share Posted October 29, 2022 Thanks @Troodon appreciate the insight! Size would also make me believe it’s more likely allosaurus species Link to comment Share on other sites More sharing options...
Troodon Posted October 29, 2022 Share Posted October 29, 2022 Ceratosaurus teeth can be longer than Allosaurus. Not as thick. Replica of one with maxillary crowns shy of 2 3/4" Link to comment Share on other sites More sharing options...
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